The sound of a jet engine is given as 120 d
B: What is the intensity of the jet sound wave?
A: 1.0 W/m2
B: 0.8 W/m2
C: 0.6 W/m2
D: 0.4 W/m2
E: 0.2 W/m2
发布时间:2024-05-19 22:28:26